WM8768
Production Data
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
DVDD
TEST CONDITIONS
MIN
2.7
2.7
2.7
TYP
MAX
3.6
UNIT
Digital supply range
Analogue reference supply
Analogue supply range
Ground
V
V
V
V
V
VREFP
5.5
AVDD
5.5
AGND, VREFN, DGND
0
0
Difference DGND to AGND
-0.3
+0.3
Note: Digital supply DVDD must never be more than 0.3V greater than AVDD for normal operation of the device.
ELECTRICAL CHARACTERISTICS
Test Conditions
AVDD, VREFP = 5V, DVDD = 3.3V, AGND, VREFN = 0V, DGND = 0V, TA = +25oC, fs = 48kHz, MCLK = 256fs, unless
otherwise stated.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Digital Logic Levels (CMOS Levels)
Input LOW level
VIL
VIH
0.3 x DVDD
0.1 x DVDD
V
V
V
V
Input HIGH level
0.7 x DVDD
0.9 x DVDD
Output LOW
VOL
VOH
I
OL=1mA
Output HIGH
IOH= -1mA
Analogue Reference Levels
Reference voltage
VVMID
RVMID
VREFP/2
100
V
Potential divider resistance
VREFP to VMID and
VMID to VREFN
kΩ
DAC Performance (Load = 10kΩ, 50pF)
0dBFs Full scale output voltage
1.0 x
VREFP/5
103
Vrms
dB
SNR (Note 1,2,4)
SNR (Note 1,2,4)
SNR (Note 1,2,4)
SNR (Note 1,2,4)
A-weighted,
@ fs = 48kHz
A-weighted
95
101
101
101
dB
@ fs = 96kHz
A-weighted
dB
@ fs = 192kHz
A-weighted
dB
@ fs = 48kHz, AVDD =
3.3V
SNR (Note 1,2,4)
A-weighted
96
dB
@ fs = 96kHz, AVDD =
3.3V
Dynamic Range (Note 2,4)
DNR
A-weighted, -60dB full
scale input
95
103
-90
dB
dB
Total Harmonic Distortion (THD)
(Note 4)
1kHz, 0dBFs
-83
Mute Attenuation
1kHz Input, 0dB gain
100
100
50
dB
dB
dB
dB
DAC channel separation
Power Supply Rejection Ratio
PSRR
1kHz 100mVpp
20Hz to 20kHz
100mVp-p
45
Supply Current
Analogue supply current
Digital Supply Current
AVDD = 5V
18.4
14.6
mA
mA
DVDD = 3.3V
PD Rev 4.1 March 2005
6
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
